package com.wuye.wx.util;

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.ConnectException;
import java.net.URL;
import java.util.Calendar;
import java.util.Date;

import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLSocketFactory;
import javax.net.ssl.TrustManager;

import net.sf.json.JSONException;
import net.sf.json.JSONObject;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;

import com.wuye.common.util.SpringUtil;
import com.wuye.common.util.date.DateUtil;
import com.wuye.common.util.string.StrUtil;
import com.wuye.entity.AttrSpec;
import com.wuye.services.CommonServiceManager;
import com.wuye.util.SysProvider;
import com.wuye.wx.pojo.AccessToken;
import com.wuye.wx.pojo.Menu;

/**
 * 公众平台通用接口工具类
 * 
 * @author liuyq
 * @date 2013-08-09
 */
public class WeixinUtil {
	private static Logger log = LoggerFactory.getLogger(WeixinUtil.class);
	
	private static CommonServiceManager commonServiceManager = SpringUtil.getBean("commonServiceManager");
	/**
	 * 发起 https 请求并获取结果
	 * 
	 * @param requestUrl
	 *            请求地址
	 * @param requestMethod
	 *            请求方式（GET、POST）
	 * @param outputStr
	 *            提交的数据
	 * @return JSONObject(通过 JSONObject.get(key)的方式获取 json 对象的属性值)
	 */
	public static JSONObject httpRequest(String requestUrl,
			String requestMethod, String outputStr) {
		JSONObject jsonObject = null;
		StringBuffer buffer = new StringBuffer();
		try {
			// 创建 SSLContext 对象，并使用我们指定的信任管理器初始化
			TrustManager[] tm = { new MyX509TrustManager() };
			SSLContext sslContext = SSLContext.getInstance("SSL", "SunJSSE");
			sslContext.init(null, tm, new java.security.SecureRandom());
			// 从上述 SSLContext 对象中得到 SSLSocketFactory 对象
			SSLSocketFactory ssf = sslContext.getSocketFactory();

			URL url = new URL(requestUrl);
			HttpsURLConnection httpUrlConn = (HttpsURLConnection) url
					.openConnection();
			httpUrlConn.setSSLSocketFactory(ssf);

			httpUrlConn.setDoOutput(true);
			httpUrlConn.setDoInput(true);
			httpUrlConn.setUseCaches(false);
			// 设置请求方式（GET/POST）
			httpUrlConn.setRequestMethod(requestMethod);

			if ("GET".equalsIgnoreCase(requestMethod))
				httpUrlConn.connect();

			// 当有数据需要提交时
			if (null != outputStr) {
				OutputStream outputStream = httpUrlConn.getOutputStream();
				// 注意编码格式，防止中文乱码
				outputStream.write(outputStr.getBytes("UTF-8"));
				outputStream.close();
			}

			// 将返回的输入流转换成字符串
			InputStream inputStream = httpUrlConn.getInputStream();
			InputStreamReader inputStreamReader = new InputStreamReader(
					inputStream, "utf-8");
			BufferedReader bufferedReader = new BufferedReader(
					inputStreamReader);

			String str = null;
			while ((str = bufferedReader.readLine()) != null) {
				buffer.append(str);
			}
			bufferedReader.close();
			inputStreamReader.close();
			// 释放资源
			inputStream.close();
			inputStream = null;
			httpUrlConn.disconnect();
			jsonObject = JSONObject.fromObject(buffer.toString());
		} catch (ConnectException ce) {
			log.error("Weixin server connection timed out.");
		} catch (Exception e) {
			log.error("https request error:{}", e);
		}
		return jsonObject;
	}

	// 获取 access_token 的接口地址（GET） 限 200（次/天）
	public final static String access_token_url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=APPID&secret=APPSECRET";

	/**
	 * 获取 access_token
	 * 
	 * @param appid
	 *            凭证
	 * @param appsecret
	 *            密钥
	 * @return
	 */
	public static String getAccessToken() {
		String appid = "";
		String appsecret = "";
		String retToken = "";
		AttrSpec accToken = SysProvider.getAttrSpec("sys_assist", "access_token");
		Date StatusDate = accToken.getStatusDate();
		if (!StrUtil.isNullOrEmpty(accToken.getDefalueValue()) 
				&& StatusDate != null
				&& StatusDate.compareTo(new Date()) > 0){
			return accToken.getDefalueValue();
		}
		AttrSpec appidAttr = SysProvider.getAttrSpec("sys_assist", "appID");
		AttrSpec appsecretAttr = SysProvider.getAttrSpec("sys_assist", "appsecret");
		/*if (true){
			//Date expDate = DateUtil.dateAdd("s", 7200, new Date());
			Calendar calendar = Calendar.getInstance();
			calendar.add(Calendar.SECOND, 7200);
			accToken.setStatusDate(calendar.getTime());
			commonServiceManager.save(accToken);
			return accToken.getDefalueValue();
		}*/
		if (appidAttr != null){
			appid = appidAttr.getDefalueValue();
		}
		if (appsecretAttr != null){
			appsecret = appsecretAttr.getDefalueValue();
		}
		//超过7200s的要重新获取凭证
		String requestUrl = access_token_url.replace("APPID", appid).replace(
				"APPSECRET", appsecret);
		JSONObject jsonObject = httpRequest(requestUrl, "GET", null);
		// 如果请求成功
		if (null != jsonObject) {
			try {
				if (StatusDate == null){
					StatusDate = new Date();
				}
				Calendar calendar = Calendar.getInstance();
				calendar.add(Calendar.SECOND, 7200);
				accToken.setStatusDate(calendar.getTime());
				
				retToken = jsonObject.getString("access_token");
				accToken.setDefalueValue(retToken);
				commonServiceManager.save(accToken);
			} catch (JSONException e) {
				retToken = "";
				// 获取 token 失败
				log.error("获取 token 失败 errcode:{} errmsg:{}",
						jsonObject.getInt("errcode"),
						jsonObject.getString("errmsg"));
			}
		}
		return retToken;
	}

	// 菜单创建（POST） 限 100（次/天）
	public static String menu_create_url = "https://api.weixin.qq.com/cgi-bin/menu/create?access_token=ACCESS_TOKEN";

	/**
	 * 创建菜单
	 * 
	 * @param menu
	 *            菜单实例
	 * @param accessToken
	 *            有效的 access_token
	 * @return 0 表示成功，其他值表示失败
	 */
	public static int createMenu(Menu menu, String accessToken) {
		int result = 0;

		// 拼装创建菜单的 url
		String url = menu_create_url.replace("ACCESS_TOKEN", accessToken);
		// 将菜单对象转换成 json 字符串
		String jsonMenu = JSONObject.fromObject(menu).toString();
		// 调用接口创建菜单
		JSONObject jsonObject = httpRequest(url, "POST", jsonMenu);

		if (null != jsonObject) {
			if (0 != jsonObject.getInt("errcode")) {
				result = jsonObject.getInt("errcode");
				log.error("创建菜单失败 errcode:{} errmsg:{}",
						jsonObject.getInt("errcode"),
						jsonObject.getString("errmsg"));
			}
		}

		return result;
	}
}